JP2600062Y2 - Ink ribbon take-up mechanism for time recorder, etc. - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for winding an ink ribbon used for printing characters in a time clock.

[0002]

2. Description of the Related Art Generally, in a time recorder, the time stamp of a clock on a time card is printed via an ink ribbon mounted on a carriage that moves left and right. The printed ink ribbon is wound up little by little.The ink ribbon take-up mechanism is provided with a pair of bobbin adapters that engage the bobbin of the ink ribbon cassette on the carriage, and one of the bobbin adapters is driven to rotate. Then, the ink ribbon is wound up by rotating a bobbin engaged with the bobbin adapter. However, the bobbin on the side to be taken up has no rotational load and rotates freely, so that there is a drawback that the ink ribbon of the ribbon cassette is slackened at the time of winding and wrinkles are formed.

As a countermeasure for this, conventionally, a leaf spring for preventing slack of the ink ribbon is mounted in the ribbon cassette, and the leaf spring is pressed against the outer peripheral surface of the ink ribbon to provide resistance to the rotation of the bobbin.

[0004] However, such a structure complicates the structure of the ribbon cassette, which is a consumable, and causes not only an increase in cost but also a problem in environmental conservation. In particular, in a multi-time ribbon that can be wound up and down in both directions and can be used repeatedly, the need for leaf springs on the left and right is even more so.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a winding mechanism in which the ink ribbon is not loosened during winding.

[0006]

To achieve the above object, according to an end], winding mechanism of the ink ribbon of the present invention is to secure the carriage to attach and detach the ink ribbon cassette to the timing belt driven by a carriage drive motor, the ink ribbon Engage each pair of bobbins in the set
A pair of bobbins adapter if the winding mechanism of the ink ribbon provided on said carriage, said Bobin'a
A bobbin gear is provided integrally with the dapper , a wire is arranged and fixed in parallel to the moving direction of the carriage, a part of the wire is wound around a wire pulley gear provided near the bobbin gear, and the wire pulley gear is mounted on the carriage. The wire pulley gear is arranged on one of the pair of bobbin adapters when the switching member swings with the movement of the carriage .
The switching member is selectively meshed and connected with a bobbin gear of the bobbin adapter , and the switching member is provided with a resistance applying means that comes into contact with the bobbin adapter on the other winding side when the switching member swings.

[0007]

According to the present invention, according to the present invention, when the carriage driving motor is operated to rotate the timing belt and the carriage is moved in one direction during printing, the wire wound around the wire pulley gear relatively moves. Pulled in the opposite direction. When the wire is pulled in the opposite direction, the wire pulley gear is also pulled in the same direction and tries to rotate. When the wire pulley gear is pulled, the switching member swings in the opposite direction. As a result, the wire pulley gear
And the bobbin adapter rotates with the bobbin gear, so that the bobbin of the ink ribbon cassette on the carriage rotates, and the ink ribbon is wound around the bobbin.

When the switching member swings as described above, the resistance imparting means abuts on the other bobbin adapter at its swinging end, so that the bobbin adapter cannot rotate freely due to the frictional force. .

As described above, when the ink ribbon is wound, a rotational resistance is applied to the bobbin adapter on the winding side, so that the ink ribbon is sent to the winding side in a tension state, and the ink ribbon is loosened. There is no.

[0010]

1 and 2 show a winding mechanism of an ink ribbon provided in a time clock. Reference numeral 1 denotes a carriage. The carriage 1 mounts and dismounts the ink ribbon cassette 2 and a printer head (not shown).
And is fixed to the timing belt 3. The timing belt 3 is stretched on a pulley 4, and the pulley 4 is meshed with an output gear 6 of a carriage driving motor 5 via an intermediate gear 7.

As shown in FIGS. 3 and 4, ink ribbons a are provided on both sides of the ink ribbon cassette 2, respectively.
Is rotatably provided. The ink ribbon a is a multi-time ink ribbon that can be used repeatedly a plurality of times. Further, it is assumed that the printing program is configured so that the time clock can print in both directions when the carriage 1 moves from left to right and when moving from right to left.

The carriage 1 is provided with bobbin adapters 10 and 11 which respectively engage with the two bobbins 8 and 9 of the ink ribbon cassette 2 for the ink ribbon a. The bobbin adapters 10 and 11 have bobbin gears 10a and 11a, respectively.
Are integrally formed.

Next, an elongated switching member 12 is disposed at the center of the carriage 1 so as to be swingable in the left-right direction with a support shaft 13 as a fulcrum. The switching member 12 includes a wire pulley gear 14 and a gear 14. The meshing switching gear 15 is rotatably supported. The switching gear 15 is configured to be able to mesh with the bobbin gears 10a and 11a of the bobbin adapters 10 and 11 when the switching member 12 swings.

The switching member 12 is provided with a resistance applying means 16 which comes into contact with the bobbin adapter 11 on the winding side when the switching member 12 swings. The resistance applying means 16 is provided with a rubber roller 1 on a support shaft 18 at an end of a mounting plate 17 having an intermediate portion fixed to an end of the switching member 12.
9 is formed so that the rubber roller 19 abuts on the peripheral surface 21 of the shaft portion of the bobbin adapter 11 at the swing end when the switching member 12 swings.

The resistance applying means is not limited to a rubber roller. Other structures such as leaf springs may be used as long as they come into contact with the bobbin adapters 10 and 11 to provide the rotation resistance.

Further, a wire 20 is arranged and fixed to the time clock in parallel with the moving direction of the carriage 1. Part of the wire 20 is wound around the wire pulley gear 14.

Reference numeral 22 denotes a stopper means which is used when the carriage 1 returns to the left or right after printing is completed.
The wire pulley gear 14 is connected to the left or right bobbin gear 10
The swinging of the switching member 12 to the opposite side is stopped at the neutral position so that the neutral position does not mesh with the a and 11a.

According to the above configuration, when printing the time card, the carriage driving motor 5 is operated to rotate the timing belt 3, and the carriage 1 is moved rightward in the figure as shown in FIG. The wire 20 wound around the wire pulley gear 14 is relatively pulled leftward. When the wire 20 is pulled to the left, the wire pulley gear 14 is also pulled to the left and tries to rotate. When the wire pulley gear 14 is pulled leftward, the switching member 12 swings leftward about the support shaft 13 as a fulcrum.
As a result, the switching gear 15 meshes with the winding bobbin gear 10a on the left side, and the bobbin adapter 10 rotates to the left along with the bobbin gear 10a, so that the bobbins 8 and 9 of the ink ribbon cassette 2 on the carriage 1 become the same in FIG. The ink ribbon a is wound around the bobbins 8 and 9 as shown in FIG.

When the switching member 12 swings around the support shaft 13 as described above, as shown in FIG. 2B, the swinging end of the rubber roller 19 is wound on the swinging end (the wound end). The bobbin adapter 11 cannot rotate freely due to the frictional force because the bobbin adapter 11 comes into contact with the peripheral surface 21 of the shaft portion of the bobbin adapter 11 on the picking side. in this way,
When the rotational resistance is applied to the bobbin adapter 11, the ink ribbon a is fed in a tension state, so that the ink ribbon a does not loosen.

When the carriage 1 returns to the left after printing is completed, the switching member 12 is turned in the opposite direction.
Swings rightward, but since the wire pulley gear 14 is held at the neutral position in FIG. 1 by the stopper means, the bobbin gears 10a and 11a on both sides idle and the ink ribbon a does not move.

On the other hand, when printing is performed when the carriage 1 moves to the left, the printing apparatus is set so as to stop at the neutral position when the switching member 12 swings from left to right. In this case, as shown in FIG. 4 (b), the switching member 12 swings to the right, contrary to the above, so that the switching gear 15 meshes with the right bobbin gear 11a (for winding) and the bobbin gear 11a together with the bobbin gear 11a. Adapter 11
Rotates to the left, the bobbin 9 of the ink ribbon cassette 2 on the carriage 1 rotates to the right as shown in FIG. 2A, and the ink ribbon a is wound on the bobbin 9.

Also in this case, when the switching member 12 swings about the support shaft 13 as described above, FIG.
As shown in FIG. 7, the swinging end of the bobbin adapter 10 comes into contact with the peripheral surface 21 of the shaft portion of the bobbin adapter 10 on the side where the rubber roller 19 is wound (the winding side). Cannot rotate.
Therefore, the ink ribbon a does not loosen.

According to the above-described winding mechanism, the winding direction of the ink ribbon a can be set bidirectionally. Therefore, when a multi-time ribbon is used, the printing direction is reversed when one side of the ribbon cassette 2 is wound. By doing so, the opposite side of the ribbon cassette 2 can be wound. Therefore, it is not necessary to turn the ribbon cassette 2 upside down, and the management is easy and the usability is good.

Note that the winding mechanism having the above configuration is not limited to the time clock, but can be applied to other devices. In the above embodiment, the switching gear meshes with the bobbin gear. However, a configuration in which the wire pulley gear meshes directly with the bobbin gear may be employed.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a main part of an ink ribbon winding mechanism according to the present invention.

FIG. 2 is a cross-sectional view of a resistance applying unit of the ink ribbon winding mechanism.

FIGS. 3A and 3B are a plan view of an ink ribbon cassette and an explanatory view of a winding mode of an ink ribbon a winding device, respectively, showing a moving direction of an ink ribbon;

FIGS. 4A and 4B are a plan view of an ink ribbon cassette and an explanatory view of a winding mode of an ink ribbon winding device, respectively, showing a moving direction of an ink ribbon;

[Explanation of symbols]

 a Ink ribbon 1 Carriage 2 Ink ribbon cassette 3 Timing belt 5 Carriage driving motor 10 Bobbin adapter 10a Bobbin gear 11 Bobbin adapter 11a Bobbin gear 12 Switching member 14 Wire pulley gear 16 Resistance applying means 20 Wire

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B41J 33/26 B41J 33/38 G07C 1/00

Claims (1)

(57) [Scope of request for utility model registration] A carriage for attaching and detaching an ink ribbon cassette is fixed to a timing belt driven by a carriage driving motor.
A pair of bobbin adapters respectively engaging with bobbins
In the ink ribbon take-up mechanism provided on the carriage , a bobbin gear is integrally provided with the bobbin adapter, and a wire is arranged and fixed in parallel with the moving direction of the carriage, and a part of the wire is provided near the bobbin gear. Wound around a wire pulley gear, and the wire pulley gear is disposed on a switching member that is swingably provided on the carriage. When the switching member swings with the movement of the carriage, the wire pulley gear is paired with the wire pulley gear. Bobbin adapter
One of the bobbin adapters is selectively meshed and connected to the bobbin gear, and the other switching member has the other one when the switching member swings.
And a resistance applying means for contacting the bobbin adapter on the winding side.